87039829 has 2 divisors, whose sum is σ = 87039830. Its totient is φ = 87039828.

The previous prime is 87039811. The next prime is 87039853. The reversal of 87039829 is 92893078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 5769604 = 9015^2 + 2402^2 .

It is a cyclic number.

It is not a de Polignac number, because 87039829 - 2⁹ = 87039317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87039529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43519914 + 43519915.

It is an arithmetic number, because the mean of its divisors is an integer number (43519915).

Almost surely, 2^87039829 is an apocalyptic number.

It is an amenable number.

87039829 is a deficient number, since it is larger than the sum of its proper divisors (1).

87039829 is an equidigital number, since it uses as much as digits as its factorization.

87039829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 87039829 is about 9329.5138672923. The cubic root of 87039829 is about 443.1723703191.

The spelling of 87039829 in words is "eighty-seven million, thirty-nine thousand, eight hundred twenty-nine".